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2	WOULD RIVAL SPECIES SHARE A NEST? DVOC Ornithological Study Chris Walters, February 2, 2006 Based on Article by Robinson, et al. entitled “Interspecific Nest Sharing by Red-breasted Nuthatch and Mountain Chickadee.” The Wilson Bulletin 117:400 (2005)
3	MOUNTAIN CHICKADEE
4	RED-BREASTED NUTHATCH
5	CHRONOLOGY OF THE 2004 SHARING OF CAVITY NEST May 31 - 2 adult Chickadees bring food to nest containing young Nuthatches and Chickadees June 1 - Adult Chickadee flushed from nest June 7 - Adult female Nuthatch at nest with 2 Nuthatch and 3 Chickadee chicks June 10 - Female Nuthatch feeding chicks and removing fecal sacs June 11 - With all chicks still in nest, the 2 Nuthatch chicks fledge June 12 - 3 Chickadee chicks still in nest; 2 Nuthatch chicks foraging nearby with the female Nuthatch June 12 (later) Female Nuthatch feeds 3 Chickadee chicks and removes fecal sac June 16 - No chicks at nest; presumed fledged because no evidence of predation
6	HOW RARE IS NEST-SHARING BETWEEN THESE SPECIES? VERY RARE In 10 year study of 691 nests, only one instance (the one reported here) was seen.
7	HOW RARE IS SUCCESSFUL INTER-SPECIFIC NEST SHARING IN ORNITHOLOGICAL LITERATURE? STILL VERY RARE
8	DOCUMENTATION OF SUCCESSFUL INTER-SPECIFIC NEST-SHARING IN ORNITHOLOGICAL LITERATURE Except for nest-sharing between Blue Tits and Great Tits – which is reported regularly – only a few other examples appear documented: A Pied Flycatcher/female Common Redstart in Sweden (1979) Mourning Dove/Yellow-billed Cuckoo European Robin/Willow Warbler European Robin/Pied Wagtail